Modeling the nonlinear clustering in modified gravity models I: A fitting formula for matter power spectrum of f(R) gravity

Abstract

Based on a suite of N-body simulations of the Hu-Sawicki model of f(R) gravity with different sets of model and cosmological parameters, we develop a new fitting formula with a numeric code, MGHalofit, to calculate the nonlinear matter power spectrum P(k) for the Hu-Sawicki model. We compare the MGHalofit predictions at various redshifts (z<=1) to the f(R) simulations and find that the accuracy on P(k) is 6% at k<1 h/Mpc and 12% at 1<k<10 h/Mpc respectively. Based on a sensitivity study of an ongoing and a future spectroscopic survey, we estimate the detectability of a signal of modified gravity described by the Hu-Sawicki model using the power spectrum up to quasi-nonlinear scales. MGHalofit is publicly available at http://icosmology.info/website/MGHalofit.html.

28 AAS pages, 6 figures. Minor revision reflecting the accepted version by The Astrophysical Journal Supplement Series. The MGHalofit code is publicly available at http://icosmology.info/website/MGHalofit.html

References in corpus (4)

• Confirmation of general relativity on large scales from weak lensing and galaxy velocities
• Testing gravity with CAMB and CosmoMC
• Initial Conditions for Large Cosmological Simulations
• Accurate estimators of power spectra in N-body simulations

Cited by in corpus (51)

• Cosmological Tests of Modified Gravity
• Testing General Relativity in Cosmology
• An accurate halo model for fitting non-linear cosmological power spectra and baryonic feedback models
• Accurate halo-model matter power spectra with dark energy, massive neutrinos and modified gravitational forces
• On the road to percent accuracy: nonlinear reaction of the matter power spectrum to dark energy and modified gravity
• Constraining chameleon models with cosmology
• The Novel Probes Project -- Tests of Gravity on Astrophysical Scales
• Constraining $f(R)$ Gravity Theory Using Weak Lensing Peak Statistics from the Canada-France-Hawaii-Telescope Lensing Survey
• On the road to percent accuracy IV: ReACT -- computing the non-linear power spectrum beyond $\Lambda$CDM
• Nonlinear structure formation in Nonlocal Gravity
• Halo model and halo properties in Galileon gravity cosmologies
• Cosmic Web and Environmental Dependence of Screening: Vainshtein vs. Chameleon
• Emulators for the non-linear matter power spectrum beyond $\Lambda$CDM
• On the road to percent accuracy II: calibration of the non-linear matter power spectrum for arbitrary cosmologies
• Speeding up $N$-body simulations of modified gravity: Chameleon screening models
• Exploring the liminality: properties of haloes and subhaloes in borderline $f(R)$ gravity
• The Imprint of f(R) Gravity on Non-Linear Structure Formation
• The one-loop matter bispectrum as a probe of gravity and dark energy
• A parametrisation of modified gravity on nonlinear cosmological scales
• The modified gravity lightcone simulation project I: Statistics of matter and halo distributions
• Fast and accurate predictions of the nonlinear matter power spectrum for general models of Dark Energy and Modified Gravity
• Theoretical Accuracy in Cosmological Growth Estimation
• Testing Modified Gravity with Cosmic Shear
• The imprint of $f(R)$ gravity on weak gravitational lensing II : Information content in cosmic shear statistics
• Extending the Coyote emulator to dark energy models with standard $w_0$-$w_a$ parametrization of the equation of state
• On the current status of Modified Gravity
• Kinetic Sunyaev-Zeldovich effect in modified gravity
• Constraint on $f(R)$ Gravity through the Redshift Space Distortion
• The imprint of $f(R)$ gravity on weak gravitational lensing I: Connection between observables and large scale structure
• $\text{Hi-COLA}$: Fast, approximate simulations of structure formation in Horndeski gravity
• Weak lensing of large scale structure in the presence of screening
• Modelling the matter bispectrum at small scales in modified gravity
• Screenings in Modified Gravity: a perturbative approach
• The matter density PDF for modified gravity and dark energy with Large Deviations Theory
• Modelling Non-Linear Effects of Dark Energy
• Cosmological Probes of Structure Growth and Tests of Gravity
• Spherical collapse in Generalized Dark Matter models
• CMB lensing bi-spectrum: assessing analytical predictions against full-sky lensing simulations
• Sesame: A power spectrum emulator pipeline for beyond-$\Lambda$CDM models
• Nonlinear effects of dark energy clustering beyond the acoustic scales
• Distinguishing screening mechanisms with environment-dependent velocity statistics
• Improved analytical modeling of the non-linear power spectrum in modified gravity cosmologies
• The kinematic Sunyaev-Zel'dovich effect of the large-scale structure (II): the effect of modified gravity
• Probing cosmology with weak lensing selected clusters II: Dark energy and f(R) gravity models
• A representation learning approach to probe for dynamical dark energy in matter power spectra
• On the degeneracies between baryons, massive neutrinos and f(R) gravity in Stage IV cosmic shear analyses
• CMB Lensing and Scale Dependent New Physics
• Non-linear matter power spectrum without screening dynamics modelling in $f(R)$ gravity
• Dynamics of pairwise motions in the fully non-linear regime in LCDM and Modified Gravity cosmologies
• Interpretable and physics-informed emulator for the linear matter power spectrum from machine learning
• Probing gravity with non-linear clustering in redshift space